Magnetic drive and hybrid pump including the same

ABSTRACT

A The hybrid pump includes an impeller, a magnetic drive configured to control rotation of the impeller, a drive shaft combined with the magnetic drive and a motor. The drive shaft rotates in response to rotation of an axis of the motor, the magnetic drive rotates when the drive shaft rotates, the impeller rotates in response to rotation of the magnetic drive, a drive body of the magnetic drive is formed of plastic, and the drive shaft is formed of metal.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of pending PCT InternationalApplication No. PCT/KR2021/000407, which was filed on Jan. 12, 2021, andwhich claims priority under 35 U.S.C 119(a) to Korean Patent ApplicationNo. 10-2020-0009170 filed with the Korean Intellectual Property Officeon Jan. 23, 2020, Korean Patent Application No. 10-2020-0009171 filedwith the Korean Intellectual Property Office on Jan. 23, 2020, andKorean Patent Application No. 10-2020-0009172 filed with the KoreanIntellectual Property Office on Jan. 23, 2020. The disclosures of theabove patent applications are incorporated herein by reference in theirentirety.

TECHNICAL FIELD

The present disclosure relates to a magnetic drive and a hybrid pumpincluding the same.

BACKGROUND ART

Conventional casing of a pump is formed of a metal. As a result, it isdifficult to process the casing and manufacturing cost of the pump isvery expensive.

SUMMARY

The present disclosure is to provide a hybrid pump manufactured simplyand a method of manufacturing a magnetic drive in the same.

Additionally, the present disclosure is to provide a magnetic driveincluding a metal member and a hybrid pump including the same.

Furthermore, the present disclosure is to provide a magnetic driveincluding a metal member combined with a magnet and a hybrid pumpincluding the same.

A hybrid pump according to one embodiment of the present disclosureincludes an impeller; a magnetic drive configured to control rotation ofthe impeller; a drive shaft combined with the magnetic drive; and amotor. Here, the drive shaft rotates in response to rotation of an axisof the motor, the magnetic drive rotates when the drive shaft rotates,the impeller rotates in response to rotation of the magnetic drive, adrive body of the magnetic drive is formed of plastic, and the driveshaft is formed of metal.

A hybrid pump according to another embodiment of the present disclosureincludes an impeller; and a magnetic drive configured to controlrotation of the impeller. Here, the magnetic drive has a plastic memberand a metal member included in the plastic member.

A method of manufacturing a magnetic drive according to one embodimentof the present disclosure includes inserting a drive shaft formed ofmetal and a metal member in a mold; and manufacturing a drive bodycombined with the drive shaft by injecting melted plastic materialcorresponding to a plastic member into the mold. Here, the metal memberis included in the drive body.

In a hybrid pump of the present disclosure, a drive body of a magneticdrive is formed of plastic and a drive shaft combined with the drivebody is formed of metal, and thus the magnetic drive may be simplymanufactured and be mass-produced.

In the hybrid pump of the present disclosure, the drive body of themagnetic drive is formed of plastic and a metal member is included inthe drive body, and so the drive body may be simply manufactured withadequate strength and cost for manufacturing the drive body may reducebecause the drive body can be mass-produced.

A magnet is directly adhered to the metal member, and thus the magnetmay be more stably fixed to the drive body.

BRIEF DESCRIPTION OF DRAWINGS

Example embodiments of the present disclosure will become more apparentby describing in detail example embodiments of the present disclosurewith reference to the accompanying drawings, in which:

FIG. 1 is a perspective view illustrating a pump according to oneembodiment of the present disclosure;

FIG. 2 is a view illustrating decomposition structure of a casingaccording to one embodiment of the present disclosure;

FIG. 3 is a perspective view illustrating a casing of the presentdisclosure;

FIG. 4 is a perspective view illustrating decomposition structure of aliner and a metal member according to one embodiment of the presentdisclosure;

FIG. 5 is a view illustrating decomposition structure of a casing in apump according to another embodiment of the present disclosure;

FIG. 6 is a view illustrating schematically section of a pump accordingto still another embodiment of the present disclosure;

FIG. 7 is a view illustrating detailed decomposition structure of apump;

FIG. 8 is a view illustrating section of a magnetic drive according toone embodiment of the present disclosure;

FIG. 9 is a view illustrating section of a magnetic drive according toanother embodiment of the present disclosure;

FIG. 10 is a view illustrating a metal member according to oneembodiment of the present disclosure;

FIG. 11 is a view illustrating section of a magnetic drive according tostill another embodiment of the present disclosure;

FIG. 12 is a view illustrating structure of a metal member according toone embodiment of the present disclosure; and

FIG. 13 is a view illustrating schematically combination structure of ametal member and a magnet according to one embodiment of the presentdisclosure.

DETAILED DESCRIPTION

In the present specification, an expression used in the singularencompasses the expression of the plural, unless it has a clearlydifferent meaning in the context. In the present specification, termssuch as “comprising” or “including,” etc., should not be interpreted asmeaning that all of the elements or operations are necessarily included.That is, some of the elements or operations may not be included, whileother additional elements or operations may be further included. Also,terms such as “unit,” “module,” etc., as used in the presentspecification may refer to a part for processing at least one functionor action and may be implemented as hardware, software, or a combinationof hardware and software.

The present disclosure relates to a hybrid pump. In the hybrid pump, adrive body of a magnetic drive may be formed of plastic and a shaft ofthe magnetic drive may be formed of metal. As a result, it is easy tomanufacture the magnetic drive and the magnetic drive may bemass-produced in less time and cost.

Additionally, the drive body of the magnetic drive in the hybrid pumpmay have a structure that a metal member is included in a plasticmember. Accordingly, it is easy to manufacture the magnetic drive withadequate strength.

In one embodiment, a magnet adhered to an internal surface of the drivebody may be directly adhered to the metal member.

Hereinafter, various embodiments of the present disclosure will bedescribed in detail with reference to accompanying drawings.

FIG. 1 is a perspective view illustrating a pump according to oneembodiment of the present disclosure. FIG. 2 is a view illustratingdecomposition structure of a casing according to one embodiment of thepresent disclosure, FIG. 3 is a perspective view illustrating a casingof the present disclosure, FIG. 4 is a perspective view illustratingdecomposition structure of a liner and a metal member according to oneembodiment of the present disclosure, and FIG. 5 is a view illustratingdecomposition structure of a casing in a pump according to anotherembodiment of the present disclosure. FIG. 6 is a view illustratingschematically section of a pump according to still another embodiment ofthe present disclosure, FIG. 7 is a view illustrating detaileddecomposition structure of a pump, and FIG. 8 is a view illustratingsection of a magnetic drive according to one embodiment of the presentdisclosure. A left view in FIG. 2 shows composition structure of a linerand a metal member, and a right view in FIG. 2 illustrates compositionstructure of a body, a liner and a metal member. A front view in FIG. 4shows decomposition structure of a liner and a metal member, and a backview in FIG. 4 illustrates composition structure of a body, a liner anda metal member.

In FIG. 1, FIG. 2 and FIG. 7, the pump of the present embodiment is ahybrid pump, and it may include an impeller 100, a casing 102, a drivemember 104, an electrical motor 106 and a shaft 108.

The impeller 100 may deliver fluid inputted to a first fluid flow space310 a through a piping such as a pipe, etc. to a second fluid flow space310 b. Particularly, the impeller 100 may rotate in a specific velocityand deliver the fluid inputted to the first fluid flow space 310 a up toa specific height of the second fluid flow space 310 b in response tothe rotating. Here, the specific height may depend on a rotationvelocity of the impeller 100.

The casing 102 includes a part of the impeller 100 to protect theimpeller 100 and may include the first fluid flow space 310 a to whichthe fluid is inputted and the second fluid flow space 310 b fordelivering the fluid transferred through the first fluid flow space 310a to another piping. Here, the first fluid flow space 310 a may crossover the second fluid flow space 310 b.

In one embodiment, in the casing 102, a metal member may be included ina plastic member. This will be described below.

The drive member 104 may prevent the fluid flowing through the firstfluid flow space 310 a from being leaked and control an operation of theimpeller 100, especially rotation operation.

The motor 106 controls a power of the pump.

The shaft 108 fixes a central part of the impeller 100. As a result, theimpeller 100 may locate in the casing 102 with fixed stably by the shaft108 and transfer fluid delivered from the first fluid flow space 310 ato a second fluid flow space 310 b. This impeller 100 may rotate throughmagnetic reaction as described below.

Hereinafter, the casing 102 and the drive member 104 may be described insequence.

Firstly, the casing 102 will be described in detail.

In FIG. 2 to FIG. 4, the casing 102 of the pump of the presentembodiment may include a body, a liner 320, a metal member having afirst sub metal member 330 and a second sub metal member 332 and asupporting member 340.

The body may include a body member 300, a first body connection member302, a first body flange member 304, a second body connection member 306and a second body flange member 308, and it may be in a body.

In one embodiment, the body may be formed of a super engineering plasticor an engineering plastic. For example, the body may be made up of apolyphenylene ethers resin composition including a polyphenylene ethersresin and a polystyrene resin. Of course, the body may be formed of apolypropylene, a polyimide, a polysulfone, a poly phenylene sulfide, apolyamide imide, a polyacrylate, a polyether sulfone, a polyether etherketone, a polyether imide, a liquid crystal polyester, a polyetherketone, etc. and their combination.

The body member 300 has for example a circular shape, but shape of thebody member 300 is not limited as the circular shape.

The first body flange member 304 is connected to one end part of thebody member 300 through the first body connection member 302 and may becombined with a flange of a piping.

In one embodiment, at least one hole may be formed on a first bodyflange member 304, a hole may be formed on the flange of the piping, andthe first body flange member 304 may be combined with the flange of thepiping by passing a fixing member such as a bolt, etc. through the holeof the first body flange member 304 and the hole of the flange of thepiping. As a result, the pump may be combined with the piping.

On the other hand, the pump may be combined with every device having aflange, and a combination process may be similar to above combinationprocess.

The second body flange member 308 may be connected to the other end partof the body member 300 through the second body connection member 306 andbe combined with a piping. The combination process is similar to thecombination process of the first body flange member 304.

The liner 320 is formed in the body and has the same shape as the bodyor has a shape similar to the body.

In one embodiment, the liner 320 may be formed of a fluorine resin. Thefluorine resin means every resin including fluorine in a molecule, andit includes a Polytetrafluoroethylene, PTFE, aPolychlorotrifluoroethylene PCTFE, a PolyVinyliDene Fluoride PVDF, aFluorinated ethylene propylene FEP, an Ethyl Tetra Fluoro Ethylene ETFEor a Perfluoroalkoxy alkane PFA, etc. This fluorine resin has excellentheat resistance, excellent chemical resistance, excellent electricinsulation, small friction coefficient, and does not have adhesion.

The liner 320 may be in a body and it may include a liner body member320 a, a first liner connection member 320 b, a first liner flangemember 320 c, a second liner connection member 320 d and a second linerflange member 320 e.

In one embodiment, the first fluid flow space 310 a through which thefluid flows may be formed in the first liner flange member 320 c, thefirst liner connection member 320 b and the liner body member 320 a, andthe second fluid flow space 310 b may be formed in the second linerflange member 320 e, the second liner connection member 320 d and theliner body member 320 a. That is, the fluid flow space may include thefirst fluid flow space 310 a and the second fluid flow space 310 b.Accordingly, the fluid inputted to the first fluid flow space 310 a maybe outputted through the second fluid flow space 310 b.

The first liner flange member 320 c may be disposed in the first bodyflange member 304, and one side of the first liner flange member 320 cmay be exposed outside.

The second liner flange member 320 e may be disposed in the second bodyflange member 308, and one side of the second liner flange member 320 emay be exposed outside.

The metal member may surround the liner 320 and be included in the body,as shown in FIG. 2 and FIG. 4. Here, whole of the metal member isincluded in the body, and none part of the metal member may be exposedoutside. That is, the liner 320 locates in the metal member, and thewhole of the metal member may be included in the body. However, a partof the metal member may be exposed at partial of an internal surface ofthe body flange member.

In one embodiment, the metal member may include a first sub metal member330 and a second sub metal member 332. For example, the metal member mayinclude two sub metal members 330 and 332 with different shape. Here,the sub metal members 330 and 332 may be independent members.

The first sub metal member 330 may be in a body, cover a part of theliner 320, and include a first sub metal body member 330 a, a 1-1 submetal connection member 330 b, a 1-1 sub metal flange member 330 c, a1-2 sub metal connection member 330 d and a 1-2 sub metal flange member330 e.

The first sub metal body member 330 a may surround a part of the linerbody member 320 a and have a curved shape.

The 1-1 sub metal flange member 330 c may be connected to an end part ofthe first sub metal body member 330 a through the 1-1 sub metalconnection member 330 b and close to the first liner flange member 320 cwhile it is disposed just beneath the first liner flange member 320 c.Particularly, a groove curve line formed at a central part of the 1-1sub metal flange member 330 c may surround a part of the first linerconnection member 320 b just beneath the first liner flange member 320c, curvature of the groove curve line being the same as or similar tothat of the first liner connection member 320 b.

In one embodiment, a width of the 1-1 sub metal flange member 330 c ishigher than that of the first liner flange member 320 c. As a result, atleast part of the 1-1 sub metal flange member 330 c may be projectedoutside the first liner flange member 320 c in a width direction whenthe 1-1 sub metal flange member 330 c surrounds the first linerconnection member 320 b, as shown in FIG. 2. Here, the first linerflange member 320 c may be projected compared to the 1-1 sub metalflange member 330 c in a longitudinal direction.

On the other hand, the 1-1 sub metal flange member 330 c might surrounddirectly the first liner flange member 320 c. In this case, the pump mayhave unstable structure because a space exists between the liner 320 andthe metal member. Accordingly, it is effective that the 1-1 sub metalflange member 330 c surrounds the first liner connection member 320 bjust beneath the first liner flange member 320 c while the 1-1 sub metalflange member 330 c closes to the first liner flange member 320 c.

At least one hole may be formed on the 1-1 sub metal flange member 330c, a fixing member passing through the hole. That is, the fixing memberpasses the hole of the first body flange member 304 and the hole of the1-1 sub metal flange member 330 c when the pump is combined with thepiping.

The 1-2 sub metal flange member 330 e may be connected to the other endpart of the first sub metal body member 330 a through the 1-2 sub metalconnection member 330 d and close to the second liner flange member 320e while it is disposed just beneath the second liner flange member 320e. Particularly, a groove curve line formed at a central part of the 1-2sub metal flange member 330 e may surround a part of the second linerconnection member 320 d just beneath the second liner flange member 320e, curvature of the groove curve line being the same as or similar tothat of the second liner connection member 320 d.

In one embodiment, a width of the 1-2 sub metal flange member 330 e ishigher than that of the second liner flange member 320 e. As a result,at least part of the 1-2 sub metal flange member 330 e may be projectedoutside the second liner flange member 320 e in a width direction whenthe 1-2 sub metal flange member 330 e surrounds the second linerconnection member 320 d, as shown in FIG. 2. Here, the second linerflange member 320 e may be projected compared to the 1-2 sub metalflange member 330 e in a longitudinal direction.

On the other hand, the 1-2 sub metal flange member 330 e might surrounddirectly the second liner flange member 320 e. In this case, the pumpmay have unstable structure because a space exists between the liner 320and the metal member. Accordingly, it is effective that the 1-2 submetal flange member 330 e surrounds the second liner connection member320 d just beneath the second liner flange member 320 e while the 1-2sub metal flange member 330 e closes to the second liner flange member320 e.

At least one hole may be formed on the 1-2 sub metal flange member 330e, a fixing member passing through the hole. That is, the fixing memberpasses the hole of the second body flange member 308 and the hole of the1-2 sub metal flange member 330 e when the pump is combined with thepiping.

On the other hand, the 2-1 sub metal flange member 332 c may have ashape of doughnuts cut by half, end sections except the groove curveline may be contacted with end sections of the 1-1 sub metal flangemember 330 c. That is, the metal member may surround the liner 320 whilethe end sections of the 1-1 sub metal flange member 330 c are contactedwith the end sections of the 2-1 sub metal flange member 332 c. Here,the 1-1 sub metal flange member 330 c has also shape of doughnuts cut byhalf.

The second sub metal member 332 may be in a body, cover the other partof the liner 320, and include a second sub metal body member 332 a, a2-1 sub metal connection member 332 b, a 2-1 sub metal flange member 332c, a 2-2 sub metal connection member 332 d and a 2-2 sub metal flangemember 332 e.

In one embodiment, the first sub metal member 330 may surround a part ofthe liner 320, and the second sub metal member 332 may surround theother part of the liner 320. That is, the sub metal members 330 and 332may surround whole of the liner 320.

The second sub metal body member 332 a may surround the other part ofthe liner body member 320 a and have a curved shape.

The 2-1 sub metal flange member 332 c may be connected to an end part ofthe second sub metal body member 332 a through the 2-1 sub metalconnection member 332 b and close to the first liner flange member 320 cwhile it is disposed just beneath the first liner flange member 320 c.Particularly, a groove curve line formed at a central part of the 2-1sub metal flange member 332 c may surround a part of the first linerconnection member 320 b just beneath the first liner flange member 320c, curvature of the groove curve line being the same as or similar tothat of the first liner connection member 320 b.

In one embodiment, a width of the 2-1 sub metal flange member 332 c ishigher than that of the first liner flange member 320 c. As a result, atleast part of the 2-1 sub metal flange member 332 c may be projectedoutside the first liner flange member 320 c in a width direction whenthe 2-1 sub metal flange member 332 c surrounds the first linerconnection member 320 b, as shown in FIG. 2. Here, the first linerflange member 320 c may be projected compared to the 2-1 sub metalflange member 332 c in a longitudinal direction.

On the other hand, the 2-1 sub metal flange member 332 c might surrounddirectly the first liner flange member 320 c. In this case, the pump mayhave unstable structure because a space exists between the liner 320 andthe metal member. Accordingly, it is effective that the 2-1 sub metalflange member 332 c surrounds the first liner connection member 320 bjust beneath the first liner flange member 320 c while the 2-1 sub metalflange member 332 c closes to the first liner flange member 320 c.

At least one hole may be formed on the 2-1 sub metal flange member 332c, a fixing member passing through the hole. That is, the fixing memberpasses the hole of the first body flange member 304 and the hole of the2-1 sub metal flange member 332 c when the pump is combined with thepiping.

The 2-2 sub metal flange member 332 e may be connected to the other endpart of the second sub metal body member 332 a through the 2-2 sub metalconnection member 332 d and close to the second liner flange member 320e while it is disposed just beneath the second liner flange member 320e. Particularly, a groove curve line formed at a center of the 2-2 submetal flange member 332 e may surround a part of the second linerconnection member 320 d just beneath the second liner flange member 320e, curvature of the groove curve line being the same as or similar tothat of the second liner connection member 320 d.

In one embodiment, a width of the 2-2 sub metal flange member 332 e ishigher than that of the second liner flange member 320 e. As a result,at least part of the 2-2 sub metal flange member 332 e may be projectedoutside the second liner flange member 320 e in a width direction whenthe 2-2 sub metal flange member 332 e surrounds the second linerconnection member 320 d, as shown in FIG. 2. Here, the second linerflange member 320 e may be projected compared to the 2-2 sub metalflange member 332 e in a longitudinal direction.

On the other hand, the 2-2 sub metal flange member 332 e might surrounddirectly the second liner flange member 320 e. In this case, the pumpmay have unstable structure because a space exists between the liner 320and the metal member. Accordingly, it is effective that the 2-2 submetal flange member 332 e surrounds the second liner connection member320 d just beneath the second liner flange member 320 e while the 2-2sub metal flange member 332 e closes to the second liner flange member320 e.

At least one hole may be formed on the 2-2 sub metal flange member 332e, a fixing member passing through the hole. That is, the fixing memberpasses the hole of the second body flange member 308 and the hole of the2-2 sub metal flange member 332 e when the pump is combined with thepiping.

On the other hand, the 2-2 sub metal flange member 332 e may have ashape of doughnuts cut by half, end sections except the groove curveline may be contacted with end sections of the 1-2 sub metal flangemember 330 e. That is, the metal member may surround the liner 320 whilethe end sections of the 1-2 sub metal flange member 330 e are contactedwith the end sections of the 2-2 sub metal flange member 332 e. Here,the 1-2 sub metal flange member 330 e has also a shape of doughnuts cutby half.

In a manufacture process, the metal member may be formed in the body byusing an insert molding. Particularly, the metal member may be includedin the body and the liner 320 may be formed in the metal member byinsert-molding a structure that the sub metal members 330 and 3322surround the liner 320 in a plastic which is material of the body.

At least one hole other than the hole for the fixing member may beformed on the flange members 330 c, 330 e, 332 c, 332 e of the metalmember, so that the metal member is fixed in the body. In this case,melt plastic fills the hole in the insert molding, and thus the metalmember may be strongly combined in the body. However, a permeatepreventing member (not shown) may be inserted into the hole for thefixing member so that the melted plastic is not filled in the hole, andthen the permeate preventing member may be removed after the insertmolding is completed.

One or more projection members may be formed on the metal member to morestrongly combine the metal member in the body.

To use two separated sub metal members 330 and 332 is for locating theliner 320 in the metal member. It is impossible to insert the liner 320in the metal member because a width of the flange member 320 c or 320 eof the liner 320 or a width of the body member 320 a is greater than aninner space of the metal member, if the metal member is in a body.Accordingly, two separated sub metal members 330 and 332 are used tolocate the liner 320 including the flange member 320 c or 320 e or thebody member 320 a higher than the inner space of the metal member in themetal member.

The supporting member 340 may support the body.

In one embodiment, the supporting member 340 may be wholly formed ofmetal and be longitudinally extended from a lower part of the bodymember 300 to support the body. In this case, the supporting member 340may be combined with the body after it is independently manufactured.

In another embodiment, the supporting member 340 may include a metalsupporting member 340 a and a plastic supporting member 340 b as shownin FIG. 5.

The metal supporting member 340 a may be longitudinally extended from alower part of the sub metal member and be formed in a body with the submetal member.

The plastic supporting member 340 b may surround the metal supportingmember 340 a and be formed together with the metal supporting member 340a when the insert molding is performed. Here, plastic of the plasticsupporting member 340 b may be formed of above material.

Accordingly, a process of forming the supporting member 340 is simple,and the supporting member 340 may support the casing with adequateforce.

Shortly, the two sub metal members 330 and 332 may be included in thebody formed of the plastic through the insert molding, while two submetal members 330 and 332 surround the liner 320. Here, the liner 320may locate in the metal member.

Distortion may occur to the casing in a direction opposed to acombination direction due to a fixing force of a fixing member when theflange of the casing is combined with a flange of the piping through thefixing member, if the body formed of plastic surrounds directly a linerand the metal member does not surround the liner.

Distortion may not occur or be minimized to the casing because theflange is strengthened though the flange of casing is combined with theflange of a piping through the fixing member, when the metal member isincluded in the body formed of the plastic while the liner 320 isdisposed in the metal member.

Of course, distortion may be prevented when the casing is combined withthe piping, if the body is formed of metal and the liner 320 is includedin the body. However, it is difficult to process the body andmanufacturing cost of the casing may increase sharply. Additionally,corrosion may occur to the casing and lifetime of the casing may getshorter.

Accordingly, the casing of the pump of the present disclosure is formedof the plastic, wherein the metal member locates in the body toreinforce strength.

It is difficult to process precisely the metal member and it is easy toprocess precisely the plastic. The casing may be realized with a desiredshape though the plastic is precisely processed without processingprecisely the metal member, when the casing is manufactured. That is,the casing may be easily embodied to have desired shape with lowmanufacturing cost, and distortion may be minimized when the casing iscombined with the piping

On the other hand, the flange member of the liner 320, the flange memberof the metal member and the flange member of the body form a flange. Inview of the flange, a metal member is included in a plastic. As aresult, distortion may be minimized though the flange of the pump iscombined with the flange of the piping.

In the above description, the metal member comprises two sub metalmembers 330 and 332 disposed symmetrically with the same shape. However,the metal member may be formed with three or more sub metal members.Here, the liner 320 may be disposed in the sub metal members and the submetal members may be included in the body. The sub metal members mayhave the same shape or at least one of the sub metal members may havedifferent shape.

For example, three sub metal members, which are separately disposed by120° with the same shape, may surround the liner 320. It is efficientthat the metal member includes two sub metal members 330 and 332 inconsideration of easiness of the process.

In another embodiment, the casing may not include the liner. That is,the casing may include a body and a metal member having a first submetal member and a second metal member, without the liner.

In still another embodiment, the pump of the present disclosure mayinclude a liner 600, a resin layer 602, a metal member 604 and a body606 disposed in sequence as shown in FIG. 6. That is, unlike the aboveembodiment, the resin layer 602 may be disposed between the liner 600and the metal member 604.

In one embodiment, the resin layer 602 may be formed of the samematerial as the body 606. The material of the body in the aboveembodiment may be used as the material of the body 606.

If molding after inserting a structure that the sub metal memberssurround the liner 700 in a plastic corresponding to the material of thebody 606 and the resin layer 602, melted plastic permeates through aspace between the liner 600 and the metal member 604 because a spaceexists between the sub metal members. As a result, the resin layer 602may be formed between the liner 600 and the metal member 604.

A hole may be formed on a part of the metal member 604 so that themelted plastic is easily permeated between the liner 600 and the metalmember 604.

The structure where the resin layer is formed between the liner and themetal member may be also applied to other embodiment.

Next, the drive member 104 will be described in detail.

In FIG. 7, the drive member 104 of the present embodiment may include anadaptor 700, a magnetic drive 702, a strength reinforcement member 704,a rear casing 706 and a drive shaft 720. The drive member 104 maycontrol rotation of the impeller 100 and prevent fluid from beingleaked.

The adaptor 700 may connect the casing 102 to the motor 106.

The magnetic drive 702 may be combined with the drive shaft 720 formedat a central part of the adaptor 700. Here, the drive shaft 720 isconnected to an axis of the motor 106, and thus the magnetic drive 702rotates in response to rotation of the axis of the motor 106.

In one embodiment, the magnetic drive 702 may include a drive body 800and at least one magnet 802, a hole or a home for receiving the strengthreinforcement member 704 being formed on the drive body 800 as shown inFIG. 8, and the drive shaft 720 may be connected to an end part of themagnetic drive 702. Accordingly, the magnetic drive 702 rotates when thedrive shaft 720 in response to rotation of the axis of the motor 106.

In one embodiment, a home is formed along an outer perimeter surface ofan end part of the drive shaft 720, and a protrusion part is formedalong an outer perimeter surface of an end part of the drive body 800.In this condition, the drive shaft 720 may be combined with the drivebody 800 by inserting the protrusion part into the home of the driveshaft 720. This combination may be formed through following insertmolding.

The magnet 802 may be for example a permanent magnet, and it may becombined in a home 810 formed on an internal surface of the drive body800 as shown in FIG. 8. For example, the magnet 802 may be combined withthe drive body 800 through an adhesive in the home 810.

The magnets 802 may be disposed with a circular shape in constantinterval, and each of the magnets 802 may be disposed on partial area ofthe drive body 800 in a longitudinal direction of the drive body 800.

Every of a bottom surface corresponding to the home 810 of the drivebody 800 and a surface of the magnet 802 contacted with the bottomsurface may be plane or curve. Since the drive body 800 may be formed ofplastic as described below, it is efficient that the bottom surface andthe surface of the magnet 802 are plane. This is because it is difficultto process the magnet 802 to have curve.

The magnet 802 is adhered in the home 810 of the drive body 800 in FIG.8. However, the magnet 802 may be adhered to the internal surface of thedrive body 800 through adhesive, without the home 810. In this case, thesurface of the magnet 802 contacted with the internal surface may have acurved shape because the internal surface of the drive body 800 has acurved shape.

In one embodiment, the drive body 800 may be formed of plastic, and thedrive shaft 720 may be formed of metal.

If every of the drive body 800 and the drive shaft 720 is formed ofmetal, durability of the magnetic drive 702 is excellent, but it isdifficult to process precisely the drive body 800 and the drive shaft720. Furthermore, it is necessary to coat the drive body 800 and thedrive shaft 720 for the purpose of preventing corrosion of the drivebody 800 and the drive shaft 720, and it should be process precisely thehome 810 of the drive body 800 for combination with the magnet 802. As aresult, manufacture period of the magnetic drive 702 is long andmanufacture cost of the magnetic dive 702 increases.

Accordingly, the pump of the present disclosure may form the drive body800 with plastic and form the drive shaft 720 with metal. In this case,it is easy to process the magnetic drive 702, manufacture cost of themagnetic drive 720 reduces, and coating for protection of corrosion isnot necessary.

In a manufacture process, the drive shaft 720 is manufactured throughprecise processing, the manufactured drive shaft 720 is inserted into amold, and then the drive body 800 combined with the drive shaft 720 maybe formed by pouring melted plastic material corresponding to the drivebody 800 into the mold. That is, the drive body 800 combined with thedrive shaft 720 may be manufactured through the insert molding.

Subsequently, the magnet 802 may be adhered in the home 810 formed onthe internal surface of the drive body 800.

If the drive body 800 combined with the drive shaft 720 is manufacturedthrough the insert molding, mass production may be realized in lessperiod of time, and it is not necessary to process precisely the home810 in which the magnet 802 is adhered. Additionally, it is notnecessary to perform coating for prevention of corrosion because thedrive body 800 is formed of plastic. As a result, manufacture period ofthe magnetic drive 702 reduces, and so cost for manufacturing reducesand mass production may be realized.

The strength reinforcement member 704 may reinforce strength of the rearcasing 706. For example, home or hole is formed on a front surface ofthe strength reinforcement member 704 as shown in FIG. 7, and the rearcasing 706 may be inserted into the home or the hole.

The rear casing 706 may receive a magnet member 100 b which is a rearpart of the impeller 100, thereby preventing leakage of fluid.Particularly, a home for receiving the magnet member 100 b may be formedon a front surface of the rear casing 706, and thus fluid outputtedthrough the impeller 100 is blocked by the rear casing 706 so that thefluid is not leaked outside.

The impeller 100 may include a fluid delivery member 100 a fordelivering fluid transferred through the first fluid flow space 310 a tothe second fluid flow space 310 b and the magnet member 100 b connectedto the fluid delivery member 100 a.

At least one magnet may be formed on an internal surface of the magnetmember 100 b. The magnet may respond to the magnet 802 formed on theinternal surface of the drive body 800. As a result, the impeller 100rotates by magnetic reaction when the drive body 800 rotates in responseto rotation of the axis of the motor 106.

In one embodiment, an N pole magnet and an S pole magnet may bealternatively disposed on the internal surface of the drive body 800,and an N pole magnet and an S pole magnet may be alternatively disposedon an internal surface of the magnet member 100 b.

The shaft 108 fixes a central part of the impeller 100 and may becombined with a ring 730 combined with the casing 102. The ring 730 mayprevent driving force and fix the shaft 108.

Briefly, the drive member 104 rotates the impeller 100 through themagnetic reaction, wherein the drive body 800 may be formed of plasticand the drive shaft 720 may be formed of metal. The drive body 800combined with the drive shaft 720 may be manufactured through the insertmolding.

On the other hand, the other elements may be modified as long as thedrive body 800 is formed of plastic, the drive shaft 720 is formed ofmetal and the magnetic drive 702 rotates the impeller 100 through themagnetic reaction.

FIG. 9 is a view illustrating section of a magnetic drive according toanother embodiment of the present disclosure, and FIG. 10 is a viewillustrating a metal member according to one embodiment of the presentdisclosure.

In FIG. 9, the magnetic drive 702 may include a drive body 900 and atleast one magnet 902, a hole and a home for receiving the strengthreinforcement member 704 being formed on the drive body 900 as shown inFIG. 9 and FIG. 10. The drive shaft 720 may be connected to an end partof the magnetic drive 702. Accordingly, the magnetic drive 702 rotateswhen the drive shaft 720 rotates according to rotation of an axis of themotor 10

The magnet 902 may be combined in a home 910 formed on an internalsurface of the drive body 900 as shown in FIG. 9. For example, themagnet 902 may be combined with the drive body 900 by using adhesive, inthe home 910.

The magnets 902 may be circularly disposed in a preset interval, andeach of the magnets 902 may be disposed on only partial of the drivebody 900 in a longitudinal direction of the drive body 900. A bottomsurface corresponding to the home 910 of the drive body 900 and asurface of the magnet 902 corresponding to the bottom surface may beplane or curve. It is efficient that the bottom surface and the surfaceof the magnet 902 are plane because the drive body 900 is formed ofplastic as described below. This is because it is difficult to processthe magnet 902 in a curved shape.

The magnet 902 is adhered in the home 910 of the drive body 900 in FIG.8, but the magnet 902 may be adhered to an internal surface of the drivebody 900 through an adhesive without the home 910. In this case, thesurface of the magnet 902 contacted with the internal surface may have acurved shape because the internal surface of the drive body 900 has acurved shape.

In one embodiment, the drive body 900 has a structure that a metalmember 922 is formed in a plastic member 920, and the drive shaft 720may be formed of metal. That is, the metal member 922 may be included inthe drive body 900. Here, the plastic member 920 may be formed ofengineering plastic.

Since the metal member 922 is included in the drive body 900, the drivebody 900 may have adequate strength, and so the drive body 900 may notbe broken down though an external force is applied to the drive body900.

In one embodiment, the plastic member 920 may have a cylinder shape, andthe metal member 922 may be formed along whole of outer circumferencesurface of the plastic member 920 under the condition that it isincluded in the plastic member 920. That is, the drive body 900 may havea section shown in FIG. 9 in a longitudinal direction of the drive body900.

In another embodiment, at least one hole 1000 may be formed on the metalmember 922 as shown in FIG. 10. In this case, melted plastic is filledin the hole 1000 in an insert molding, and thus the metal member 922 maybe more strongly combined in the plastic member 920.

In a manufacture process, the drive shaft 720 and the metal member 922connected to the drive shaft 720 are manufactured through preciseprocessing, the manufactured drive shaft 720 and the metal member 922are inserted into a mold, and then the drive body 900 combined with thedrive shaft 720 may be formed by pouring melted plastic materialcorresponding to the plastic member 920 of the drive body 900 into themold. That is, the drive body 900 combined with the drive shaft 720 maybe manufactured through the insert molding.

Subsequently, the magnet 902 may be adhered in the home 910 formed onthe internal surface of the drive body 900.

If the drive body 900 combined with the drive shaft 720 is manufacturedthrough the insert molding, mass production may be realized in lessperiod of time, and it is not necessary to process precisely the home910 in which the magnet 902 is adhered. Additionally, it is notnecessary to perform coating for prevention of corrosion because theplastic member 920 exposed outside of the drive body 900 is formed ofplastic. As a result, manufacture period of the magnetic drive 702reduces, and so cost for manufacturing the magnetic drive 702 reducesand mass production may be realized.

In another embodiment, the drive shaft 720 and the metal member 922 maybe separated. In this case, plastic layer exists between the drive shaft720 and the metal member 922.

In a manufacture process, the drive shaft 720 and the metal member 922are individually manufactured through precise processing, the driveshaft 720 and the metal member 922 are inserted into a mold, and thenthe drive body 900 combined with the drive shaft 720 may be formed bypouring melted plastic material corresponding to the plastic member 920of the drive body 900 into the mold.

Next, the magnet 902 may be adhered in the home 910 formed on theinternal surface of the drive body 900.

Shortly, the drive member 104 rotates the impeller 100 by using magneticreaction. Here, the drive body 900 may have the structure that the metalmember 922 is included in the plastic member 920 and the drive shaft 720may be formed of metal. The drive body 900 combined with the drive shaft720 may be manufactured through the insert molding.

On the other hand, the other elements may be variously modified as longas the drive body 900 has the structure that the metal member 922 isincluded in the plastic member 920, the drive shaft 720 is formed ofmetal and the magnetic drive 702 rotates the impeller 100 by using themagnetic reaction.

FIG. 11 is a view illustrating section of a magnetic drive according tostill another embodiment of the present disclosure. FIG. 12 is a viewillustrating structure of a metal member according to one embodiment ofthe present disclosure, and FIG. 13 is a view illustrating schematicallycombination structure of a metal member and a magnet according to oneembodiment of the present disclosure.

In FIG. 11, the magnetic drive 702 may include a drive body 1100 and atleast one magnet 1102, a hole and a home for receiving the strengthreinforcement member 704 being formed on the drive body 1100 as shown inFIG. 7 and FIG. 11. The drive shaft 720 may be connected to an end partof the magnetic drive 702.

The magnet 1102 may be for example a permanent magnet, and it may bedirectly combined with a metal member 1122 in a space 1110 formed on aninternal surface of the drive body 1100 as shown in FIG. 11. Forexample, the magnet 1102 may be adhered to a combination part 1122 b ofthe metal member 1122 by using an adhesive, in the space 1110.

In one embodiment, the drive body 1100 may have a structure that themetal member 1122 is included in a plastic member 1120, and the driveshaft 720 may be formed of metal. That is, the metal member 1122 may beincluded in the drive body 1100. Here, the plastic member 1120 may beformed of engineering plastic.

Since the metal member 1122 is included in the drive body 1100, thedrive body 1100 may have adequate strength, and thus the drive body 1100may be broken down though an external force is applied to the drive body1100.

In one embodiment, at least one hole 1200 may be formed on the metalmember 1122 as shown in FIG. 12. In this case, melted plastic is filledin the hole 1200 when the insert molding is performed, and so the metalmember 1122 may be more strongly combined in the plastic member 1120.

In still another embodiment, the space 1110 for exposing the metalmember 1122 may be formed on the internal surface of the drive body 1100as shown in FIG. 11. The magnet 1102 may be adhered to the metal member1122 in the space 1110. Adhesion when the magnet 1102 is adhered to themetal member 1122 may be greater than that when the magnet 1102 isadhered to plastic.

In one embodiment, the metal member 1122 includes a combination part1122 b to which the magnet 1102 is adhered, thickness of the combinationpart 1122 b being higher than that of the other part 1122 a. As aresult, the combination part 1122 b may endure the weight of the magnet1102. Cost of the metal member 1122 increases when the other part 1122 ahas also great thickness. Accordingly, it is efficient to form onlycombination part 1122 b combined with the magnet 1102 with greatthickness.

In one embodiment, a part 1300 at which the metal member 1122 and themagnet 1102 are combined may have plane shape as shown in a left view inFIG. 13, and corresponding part of the magnet 1102 may have plane shape.

In another embodiment, the part 1300 at which the metal member 1122 andthe magnet 1102 are combined may have a curved shape as shown in a rightview of FIG. 13, and corresponding part of the magnet 1102 may have acurved shape.

Shortly, the drive member 104 rotates impeller 100 by using magnetreaction. The drive body 1100 may have the structure that the metalmember 1122 is included in a plastic member 1120 and the drive shaft 720may be formed of a metal. The drive body 1109 combined with the shaft720 may be manufactured through the insert molding.

On the other hand, the other elements may be variously modified as longas the drive body 1100 has the structure that the metal member 1122 isincluded in the plastic member 1120, the drive shaft 720 is formed ofmetal and the magnetic drive 702 rotates the impeller 100 by using themagnetic reaction.

Hereinafter, material of a body of the casing 102 or the drive body willbe described in detail.

The body of the casing 102 or the drive body may be formed by mixing aglass fiber with a Polyvinyl Chloride PVC, a polypropylene PP, a PolyPhenylene sulfide PPS, a Polyphthalamide PPA, a Polyamide PA6, aPolyamide PA66, a Polyketone POK or a Polyethylene PE. As a result,strength, impact resistance and mechanical feature of the body of thecasing 102 or the drive body may be enhanced.

In another embodiment, the body of the casing 102 or the drive body maybe formed by mixing a glass fiber and a carbon fiber with for example, aPVC, a PP, a PPS, a PPA, a PA6, a PA66, a POK or a PE. Accordingly,strength, impact resistance and mechanical feature of the body of thecasing 102 or the drive body may be enhanced.

In still another embodiment, the body of the casing 102 or the drivebody may be formed by mixing a glass fiber, a carbon fiber and agraphite fiber with for example, a PVC, a PP, a PPS, a PPA, a PA6, aPA66, a POK or a PE. Here, composition of the glass fiber, the carbonfiber and graphite fiber may be 20:10:5. As a result, strength, impactresistance and mechanical feature of the body of the casing 102 or thedrive body may be enhanced.

Hereinafter, composition and an experimental result of the body of thecasing 102 or the drive body will be described.

In one embodiment, the body of the casing 102 or the drive body may beformed by mixing a PP with a glass fiber. Preferably, the glass fiberhas a weight percent higher than 0 weight percent and less than 40weight percent, and the PP has a weight percent higher than 60 weightpercent. Experimental result is shown in following table 1.

TABLE 1 glass Tensile fiber strength weight (Mpa @ 23° C.) embodimentpercent [ASTM D638] comparison  0 25 1 10 54 2 15 59 3 20 78 4 30 83 540 94

It is verified through the above table 1 that tensile strength of thebody of the casing 102 or the drive body when the body of the casing 102or the drive body is formed by mixing the PP with the glass fiber isvery greater than that of a body or a drive body formed of only the PP.That is, mechanical property and chemical property may be enhanced.However, it is difficult to manufacture the body of the casing 102 orthe drive body to have desired shape because an insert molding featurefor manufacturing the body of the casing 102 or the drive body isdeteriorated when the glass fiber has a weight percent higher than 40weight percent. In another embodiment, the body of the casing 102 or thedrive body may be formed by mixing a PPS with a glass fiber. Preferably,the glass fiber has a weight percent higher than 0 weight percent andless than 40 weight percent, and the PPS has a weight percent higherthan 60 weight percent. Experimental result is shown in following table2.

TABLE 2 glass Tensile fiber strength weight (Mpa @ 23° C.) embodimentpercent [ASTM D638] comparison  0  70 1 30 140 2 40 200

It is verified through the above table 2 that tensile strength of thebody of the casing 102 or the drive body when the body of the casing 102or the drive body is formed by mixing the PPS with the glass fiber isvery greater than that of a body or a drive body formed of only the PPS.That is, mechanical property and chemical property may be enhanced, andthus light and strong body of the casing 102 or drive body may beformed. However, it is difficult to manufacture the body of the casing102 or the drive body to have desired shape because an insert moldingfeature for manufacturing the body of the casing 102 or the drive bodyis deteriorated when the glass fiber has a weight percent higher than 40weight percent. In still another embodiment, the body of the casing 102or the drive body may be formed by mixing a PPA with a glass fiber.Preferably, the glass fiber has a weight percent higher than 0 weightpercent and less than 55 weight percent, and the PPA has a weightpercent higher than 45 weight percent. Experimental result is shown infollowing table 3.

TABLE 3 glass Tensile fiber strength weight (Mpa @ 23° C.) embodimentpercent [ASTM D638] comparison  0 105 1 25 170 2 35 210 3 45 250 4 55270

It is verified through the above table 3 that tensile strength of thebody of the casing 102 or the drive body when the body of the casing 102or the drive body is formed by mixing the PPA with the glass fiber isvery greater than that of a body or a drive body formed of only the PPA.That is, mechanical property and chemical property may be enhanced, andthus light and strong body of the casing 102 or drive body may beformed. However, it is difficult to manufacture the body of the casing102 or the drive body to have desired shape because an insert moldingfeature for manufacturing the body of the casing 102 or the drive bodyis deteriorated when the glass fiber has a weight percent higher than 55weight percent. In still another embodiment, the body of the casing 102or the drive body may be formed by mixing a PA6 with a glass fiber.Preferably, the glass fiber has a weight percent higher than 0 weightpercent and less than 50 weight percent, and the PA6 has a weightpercent higher than 50 weight percent. Experimental result is shown infollowing table 4.

TABLE 4 glass Tensile fiber strength weight (Mpa @ 23° C.) embodimentpercent [ASTM D638] comparison  0  70 1 15 125 2 20 145 3 30 170 4 33180 5 35 185 6 40 192 7 45 200 8 50 220

It is verified through the above table 4 that tensile strength of thebody of the casing 102 or the drive body when the body of the casing 102or the drive body is formed by mixing the PA6 with the glass fiber isvery greater than that of a body or a drive body formed of only the PA6.That is, mechanical property and chemical property may be enhanced, andthus light and strong body of the casing 102 or drive body may beformed. However, it is difficult to manufacture the body of the casing102 or the drive body to have desired shape because an insert moldingfeature for manufacturing the body of the casing 102 or the drive bodyis deteriorated when the glass fiber has a weight percent higher than 50weight percent. In still another embodiment, the body of the casing 102or the drive body may be formed by mixing a PA66 with a glass fiber.Preferably, the glass fiber has a weight percent higher than 0 weightpercent and less than 50 weight percent, and the PA66 has a weightpercent higher than 50 weight percent. Experimental result is shown infollowing table 5.

TABLE 5 glass Tensile fiber strength weight (Mpa @ 23° C.) embodimentpercent [ASTM D638] comparison  0  80 1 25 165 2 30 186 3 33 196 4 35200 5 50 245

It is verified through the above table 5 that tensile strength of thebody of the casing 102 or the drive body when the body of the casing 102or the drive body is formed by mixing the PA66 with the glass fiber isvery greater than that of a body or a drive body formed of only thePA66. That is, mechanical property and chemical property may beenhanced, and thus light and strong body of the casing 102 or drive bodymay be formed. However, it is difficult to manufacture the body of thecasing 102 or the drive body to have desired shape because an insertmolding feature for manufacturing the body of the casing 102 or thedrive body is deteriorated when the glass fiber has a weight percenthigher than 50 weight percent. In still another embodiment, the body ofthe casing 102 or the drive body may be formed by mixing a POK with aglass fiber. Preferably, the glass fiber has a weight percent higherthan 0 weight percent and less than 40 weight percent, and the POK has aweight percent higher than 60 weight percent. Experimental result isshown in following table 6.

TABLE 6 glass Tensile fiber strength weight (Mpa @ 23° C.) embodimentpercent [ASTM D638] comparison  0  60 1 15 100 2 20 125 3 30 140 4 40165

It is verified through the above table 6 that tensile strength of thebody of the casing 102 or the drive body when the body of the casing 102or the drive body is formed by mixing the POK with the glass fiber isvery greater than that of a body or a drive body formed with only thePOK. That is, mechanical property and chemical property may be enhanced,and thus light and strong body of the casing 102 or drive body may beformed. However, it is difficult to manufacture the body of the casing102 or the drive body to have desired shape because an insert moldingfeature for manufacturing the body of the casing 102 or the drive bodyis deteriorated when the glass fiber has a weight percent higher than 40weight percent.

Components in the embodiments described above can be easily understoodfrom the perspective of processes. That is, each component can also beunderstood as an individual process. Likewise, processes in theembodiments described above can be easily understood from theperspective of components.

The embodiments of the present disclosure described above are disclosedonly for illustrative purposes. A person having ordinary skill in theart would be able to make various modifications, alterations, andadditions without departing from the spirit and scope of the invention,but it is to be appreciated that such modifications, alterations, andadditions are encompassed by the scope of claims set forth below.

1. A hybrid pump comprising: an impeller; a magnetic drive configured tocontrol rotation of the impeller; a drive shaft combined with themagnetic drive; and a motor, wherein the drive shaft rotates in responseto rotation of an axis of the motor, the magnetic drive rotates when thedrive shaft rotates, and the impeller rotates in response to rotation ofthe magnetic drive, wherein a drive body of the magnetic drive is formedof plastic, and the drive shaft is formed of metal.
 2. The hybrid pumpof claim 1, wherein the magnetic drive includes the drive body of whichat least one home is formed on an internal surface and a first magnetcombined in the home, the impeller includes a fluid delivery member fordelivering fluid inputted through a first fluid flow space to a secondfluid flow space and a magnet member connected to the fluid deliverymember, one or more second magnets being formed on an internal surfaceof the magnet member, and the impeller rotates according as the drivebody rotates in response to reaction of the first magnet and the secondmagnet.
 3. The hybrid pump of claim 2, further comprising: a rear casingof which a home is formed on a front surface, the magnet member beingreceived in the home a strength reinforcement member configured toreceive the rear casing to reinforce strength, wherein the rear casingprevents leakage of the fluid.
 4. The hybrid pump of claim 1, whereinthe drive body is formed of engineering plastic.
 5. The hybrid pump ofclaim 1, wherein the drive body is formed by mixing a glass fiber with aPolyvinyl Chloride PVC, a polypropylene PP, a Poly Phenylene sulfidePPS, a Polyphthalamide PPA, a Polyamide PA6, a Polyamide PA66, aPolyketone POK or a Polyethylene PE.
 6. A hybrid pump comprising: animpeller; and a magnetic drive configured to control rotation of theimpeller, wherein the magnetic drive has a plastic member and a metalmember included in the plastic member.
 7. The hybrid pump of claim 6,further comprising: a drive shaft combined with the magnetic drive; anda motor, wherein the drive shaft rotates in response to rotation of anaxis of the motor, the magnetic drive rotates when the drive shaftrotates, and the impeller rotates in response to rotation of themagnetic drive, wherein the metal member is formed along whole of anouter circumference surface of the plastic member, and the drive shaftis formed of metal.
 8. The hybrid pump of claim 7, further comprising: arear casing of which a home is formed on a front surface, a magnetmember being received in the home; and a strength reinforcement memberconfigured to receive the rear casing to reinforce strength, wherein atleast one home is formed on an internal surface of the plastic member,and a first magnet is adhered in the home, wherein the impeller includesa fluid delivery member for delivering fluid inputted through a firstfluid flow space to a second fluid flow space and the magnet memberconnected to the fluid delivery member, one or more second magnets beingformed on an internal surface of the magnet member, wherein the impellerrotates according as the magnetic drive rotates in response to reactionof the first magnet and the second magnet, and the rear casing preventsleakage of the fluid.
 9. The hybrid pump of claim 6, wherein the plasticmember is formed of engineering plastic.
 10. The hybrid pump of claim 6,wherein a space is formed at partial of the plastic member, a partcorresponding to the space of the metal member is exposed outside, and afirst magnet is combined with the metal member in the space.
 11. Thehybrid pump of claim 10, wherein the drive shaft and the metal memberare directly connected, and a part combined with the first magnet of themetal member has higher thickness than in the other part.
 12. The hybridpump of claim 10, wherein a part at which the metal member and the firstmagnet meet has a curved shape, and a part combined with the metalmember of the first magnet has a curved shape.
 13. A method ofmanufacturing a magnetic drive, the method comprising: inserting a driveshaft formed of metal and a metal member in a mold; and manufacturing adrive body combined with the drive shaft by injecting melted plasticmaterial corresponding to a plastic member into the mold, wherein themetal member is included in the drive body.
 14. The method of claim 13,wherein a space is formed at partial of the drive body, a partcorresponding to the space of the metal member is exposed outside, amagnet is adhered to the metal member in the space, and a structure thatthe drive shaft and the metal member are combined is inserted into themold while the drive shaft and the metal member are connected.